61684260733 has 4 divisors (see below), whose sum is σ = 62465074240. Its totient is φ = 60903447228.

The previous prime is 61684260727. The next prime is 61684260749. The reversal of 61684260733 is 33706248616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61684260733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61684260433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390406635 + ... + 390406792.

It is an arithmetic number, because the mean of its divisors is an integer number (15616268560).

Almost surely, 2^61684260733 is an apocalyptic number.

It is an amenable number.

61684260733 is a deficient number, since it is larger than the sum of its proper divisors (780813507).

61684260733 is an equidigital number, since it uses as much as digits as its factorization.

61684260733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780813506.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 61684260733 in words is "sixty-one billion, six hundred eighty-four million, two hundred sixty thousand, seven hundred thirty-three".